Anti-interference type infrared touch device and positioning method

Abstract

The invention provides an anti-jamming infrared touch device, including vertical and horizontal direction of one or more transmitter modules and receiver modules. The transmitter modules are connectedwith synchronous signal lines, and the receiver modules are linked to synchronization signals and bus lines. Both the receiver and transmitter modules have a slave microprocessor. The device still has a main microprocessor, which exports benchmark synchronous signals to the slave microprocessor of the entire transmitter and receiver modules. According to the timing stagger, special synchronization signals are generated, and then scan transmitter and receiver tube from No.1 to N one by one. Each of the infrared transmitter and receiver modules launches simultaneous reception on the tube, but at least one other adjacent or separated transmitter and receiver modules in the corresponding infrared control group uses asynchronous working methods. The anti-jamming infrared touch device and location method has strong anti-jamming ability, rapid processing speed, and it is applicable to large-screen positioning.

Description

【Technical field】 [0001] The invention relates to an infrared positioning technology and equipment, in particular to an anti-interference infrared touch device and positioning method applied to electronic display equipment or other writing planes for capturing and reproducing writing tracks. 【Background technique】 [0002] Electronic touch technology provides great convenience for human-computer interaction, and also provides a variety of technical solutions, and the performance and reliability are constantly improving. At present, there are two common methods in the market: one is the passive method, which uses resistance, capacitance, and infrared scanning technology, and is characterized in that it can be used as the capture object of the positioning device without a specially processed pen; the other is the active method, such as Electromagnetic positioning and ultrasonic positioning, this method requires a specially made electronic pen to be used. Once the pen is lost o...

AI Technical Summary

Problems solved by technology

When the occluder is at the position of occluder 2, the light blocked by the occluder will affect the receiving tubes m of X_RCV1, X_RCV2, and X_RCV3 at the same time, so that the receiving modules X_RCV1, X_RCV2, and X_RCV3 will detect the occlusion information at the same time, so that in the X direction at the same time Three occlusion positions are detected. Similarly, there is a problem that multiple occlusion information is detected simultaneously in the Y direction, which causes the positioning device to be unable to judge the specific occlusion position. If the size is increased, the emission tube m will interfere with the infrared tubes corresponding to more modules, and the same principle applies to other infrared tubes; the infrared touch device involves the scanning of a large number of infrared tubes, and in the large-sized infrared touch device, there is also Multiple microprocessors are involved, so it takes a lot of time to complete the scanning of a large number of infrared tubes and the communication between multiple microprocessors. It takes too long to use the general scanning method and the master-slave call communication mode, which seriously affects The writing speed and effect of the infrared touch device are improved; as a form of light, infrared light has the problem of reflection. Infrared light will be emitted along the reflective surface formed by the edge of the infrared positioning frame, causing the writing object to be unable to write normally in some areas; as a touch technology, the infrared touch device is required to provide various sizes, and the traditional design structure cannot meet the requirements. Flexible design for various size requirements

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